Saw-swaging machine



(No Model.)

M. OOVEL.

SAW SWAGING- MACHINE.

No. 345,121. Patented July 6, 1886.

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NITED STATES PATENT OFFICE.

MILO OOVEL, OF CHICAGO, ILLINOIS.

VSAW-SWAGING MACHINE.-

SPECIFICATIONfoIming part of Letters Patent No. 345,121, dated July 6, 1886.

Application filed October 2, 1885. Serial No. 181,207. (No model.)

ence being had to the accompanyingdrawings,

forming a part of this specification.

This invention relates to improvements in that class of devices that are more especially intended for use on band and gang saws; and 1t consists of certain novel features inthe construction, combination, and arrangement of parts, as will be hereinafter set forth.

Figure 1 is a front elevation; Fig. 2, a topview with the cap A removed; Fig. 3, a vertical section in the plane 3, Fig.1; and Fig. 4

a horizontal section in the plane 4, Fig. 1.

Referring to the drawings, A represents a frame or back plate to which the working.

parts are attached. This frame is usually bolted to some substantial support and in the position shown in Fig. 1. v

A is the operating-lever, pivoted to a projecting lug on the frame, and is moved or retained in place on the upper side by means of the removable cap A bolted in place, the dies being provided with elongated apertures, as shown in Fig. 2, so as to admit of proper adjustment without interference from the cap bolts a a. The position of the stationary die is changed by the screw to.

The spring clamping-jaws a" a serve to rigidly clamp the saw as each tooth is being swaged. The jaw a is secured to the supporting-frame, and the jaw a to the angle guideplate a", as shown in Fig. 4. The loose end of the jaw a is set in the direction of the saw by means of the adj listing-screw a. The under side (gt the movable dieB is provided with the wedge-block a, the end of which projects a little in advanceof said die, as shown in Fig. 2, and as the die moves forward the advanced end of the wedge a passes in back of the loose end of the jaw a, as shown in Fig. 4, and forces the same in the direction of the companion jaw, and firmly clamps the saw between the two just before the tooth is swaged,

the saw being released as the movable die recedes. The spring a (shown in Fig. 2) serves to assist in spreadingthe dies when the operating-lever is returned to a normal position.

The slide B supports the saw in proper position to be operated upon, and is capable of a vertical adjustment by means of the screw B, so as to adapt this part of the device to saws of different widths. The lower end of the screw B is journaled in the cross-bar B andhas the beveled pinion a mounted thereon, which engages with the companion pinion a, mounted on the inner end of the horizontal shaft 2), the hand-crank I) being mounted on the outer end of said shaft. By this means the slide B is raised or lowered by hand, as may be required in accordance with the width of thesaw.

The arm 0 connects the operating-lever with the upper end of the angular lever O, pivoted to the frame-work at Z). The lower end of this angular lever is connected to the outer end of the horizontal moving bar 0, which has a sliding bearing on the lower part of the frame. The bar 0 is cut away 011 the upper side for a little way back from the inner end, thus forming an offset and lessening the width of the bar at that point. The cross-bar 13* is cutaway on the under side in a corresponding mannerand rests on top of the bar U.

As shown in Fig. 1, the bar B rests on the narrowest part of the bar 0 In this position the saw (indicated by the dotted lines) is ready to be raised up, so as to bring the next tooth into position to be swaged. Now, as the operating-lever is moved to bring the dies together, the bar 0' is forced inward by the con nections described, bringing the wider part of the same under the wider part of the bar B, and thus raising the saw and bringing the teeth into position at the proper time to be operated upon by the swagingdies.

. -When the lever is returned to a normal position, the bar O is drawn back and the bar B gravitates to its lowest position, the weight of the saw and the spiral spring b" assisting to produce this result.

The feed-arm D is pivoted at I)", and is adapted to have an oscillating or vibratory action onits pivot. The upper end of this arm has the feed-finger d pivoted thereto, the loose end of which is adapted to engage with the teeth of the saw and bring each tooth into position to be operated upon. The lower end of the feed-arm has frictional contact with the lug-d on thebar O, by which means thelower end of the feed-arm is forced outward and the saw fed forward one tooth at each movement. The spring d serves to return the feedarm to a normal position when the pressure of the bar (J is relaxed, the iced-finger dropping into the next tooth. The adjustable stop E limits the throw of the feed-arm.

The operation of the device is as follows: The slide B should be first adjusted by hand to receive the saw and support the same at the proper height relative to the swaging'dies. The operating-lever is nou moved inward from a normal position, and as the movable die approaches the companion die the saw is raised to bring the point of the tooth between the two through the medium of the connectingarm 0, the angular or bell-crank lever O, and the wedging-bar C. At the same time the wedge-block a" throws the jaw a inward in position to clamp the saw, and the pressure onthe lower end of the feed-arm D being relaxed the spring d" throws the upper end back and drops the feed-finger into the next tooth, so that when the operatinglever is returned thesaw is moved ahead one tooth. Thus all the mechanism is actuated by the movement of 0 said lever.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a saw-swage, the combination, with an operating-lever, of a movable die connected with said lever, a wedge-block attached to the under side of and projecting a little in advance of said die, and the clamping jaws a a, whereby one of said jaws is forced in the direetion of the companion jaw and the saw clamped between the two, substantially as set forth.

2. In a saw-swagc, the combination, with the frame A of the cross-bar A" the remov able cap A", and the angular guide-plate a, substantially as set forth.

3. In a saw-swage, the combination, with the operating-lever A, of the connecting-arm O, the angular lever C, the horizontal moving bar 0, having an offset on the upper side, the cross-barB, having a corresponding ofl'set, the screw B, and the saw-supporting slide B, whereby the saw is raised and lowered ateach movement of the operating lever, substair t-ially as and for the purpose set forth.

4. In a sawswage, the combination, with the operating-lever, of the arm 0, the angular lever O. the horizontal bar 0', the i'eedarm D, and the feed-finger (1, adapted to engage with the saw-teeth, whereby the saw is moved one tooth at each return movement of the operating-lever, substantially as and for the purpose set forth.

MILO OOVEL.

Witnesses:

L. M. FREEMAN, U. STANWOOD. 

